<div id="map"></div>
<script>
    var map = new mapboxgl.Map({
        container: 'map',
        style: 'mapbox://styles/mapbox/streets-v11',
        center: [-87.61694, 41.86625],
        zoom: 15.99,
        pitch: 40,
        bearing: 20,
        antialias: true
    });

    map.on('load', function() {
        map.addSource('floorplan', {
            // GeoJSON Data source used in vector tiles, documented at
            // https://gist.github.com/ryanbaumann/a7d970386ce59d11c16278b90dde094d
            'type': 'geojson',
            'data':
                'https://docs.mapbox.com/mapbox-gl-js/assets/indoor-3d-map.geojson'
        });
        map.addLayer({
            'id': 'room-extrusion',
            'type': 'fill-extrusion',
            'source': 'floorplan',
            'paint': {
                // See the Mapbox Style Specification for details on data expressions.
                // https://docs.mapbox.com/mapbox-gl-js/style-spec/#expressions

                // Get the fill-extrusion-color from the source 'color' property.
                'fill-extrusion-color': ['get', 'color'],

                // Get fill-extrusion-height from the source 'height' property.
                'fill-extrusion-height': ['get', 'height'],

                // Get fill-extrusion-base from the source 'base_height' property.
                'fill-extrusion-base': ['get', 'base_height'],

                // Make extrusions slightly opaque for see through indoor walls.
                'fill-extrusion-opacity': 0.5
            }
        });
    });
</script>
